Whatnot seller account
Free to sign up on Whatnot
Run your live show. Relai labels wins, organizes buyers, and proves every purchase.
- Chrome
- Mac, Windows & Linux
- Cloud — connect anywhere
- Cancel anytime
- Works with your printer
What you need to get started
Everything required to run your first show with Relai.
Thermal label printer
USB connection preferred
Mac, Windows, or Linux desktop
macOS 11+, Windows 10/11, or Linux with CUPS — not Chromebook
Google Chrome
Relai runs in Chrome — extension and web app
Silent label printing: Mac, Windows, or Linux desktop
Before and after Relai
What the end of a show looks like, with and without it.
Before
Writing labels by hand, sorting after the show.
- Scribbling usernames or item numbers between sales.
- Hunting through a pile of items to group them by buyer.
- Hours of sorting before you can start packing.
After
Labels print themselves. Packages are already organized.
- A label prints the moment a buyer wins.
- Same buyer wins again? Same number. Items stay together.
- Show ends, everything is sorted — you start packing.
How it works
Relai works seamlessly in the background while you sell
- 1
Install & Connect
Install the Relai Chrome extension. Open your show in Relai, connect your thermal printer, and pick your label size. We recommend removable labels so they peel off cleanly.
- 2
Go Live
Stream from your phone or iPad as usual on a separate computer. Relai watches wins, bins buyers' wins, and prints labels automatically.
- 3
Pack & Ship
Labels print with buyer numbers. Use the Sorter page, download your after-show PDF, and ship — buyers can check the Locker Room anytime.
Live demo
Watch a label print on every win
When a buyer wins on stream, Relai detects it and sends the label to your printer automatically — no typing, no delay.
After the show
Dashboard, PDF, and Sorter — built in
Relai keeps working after the last item sells. Organize, print, and pack without starting over.
Seller Dashboard
Your command center — lots sold, locker room visits, and estimated time saved. See how Relai is working for your business month to month.
After-Show PDF
Download a printable buyer and lot summary when the show ends. Match items to buyers, fix spelling, and pack without digging through notes.
Sorter Live Page
Share a link with packers on your team. Mark lots binned in real time during the show — no seller login required on the sorter screen.
Buyer Locker Room
Give buyers proof of purchase — instantly
The feature live sellers ask for most. Buyers see their wins without waiting on DMs or tracking numbers.
- Buyers enter their username and instantly see photos of their wins.
- Builds trust right after the show — no waiting days for proof of purchase.
- Monster hits and lot details buyers actually want to see.
- 300 Buyer Locker Room photos included in your free trial.
Works with your thermal printer
Relai sends labels through your computer's standard print system on Mac, Windows, or Linux desktop — so it works with any thermal printer your computer can see.
USB (recommended)NetworkBluetoothRemovable labels recommended
Silent label printing: Mac, Windows, or Linux desktop
Compatible label sizes
Choose the size that fits your workflow.
2 × 2"
Compact square tags for small items.
2 × 3"
Popular all-around size for most items.
3 × 3"
More room for item and buyer details.
4 × 6"
Shipping-label size — sort and ship on one label.
Three print modes
Choose how labels print during your stream.
Every Item
Prints a label for every auction win. Each label shows the username, item name, and a badge like "Auction Win" or "Buy It Now." Best when you want to tag each item individually.
42Auction win
TestUser123
Mens Black Leather Jacket Size L
Once Per Buyer
Prints one label per buyer on their first win of the show. Shows a large buyer number and username. The box method: stick the label on a box or bag, then toss in each item as that buyer keeps winning.
42
TestUser123
Every Item + Buyer
Both at once. Prints an item label for each win and a buyer label on the first win. Tag individual items and sort by buyer at the same time.
42Auction win
TestUser123
Mens Black Leather Jacket Size L
42
TestUser123
Built for live sellers
Everything you need to streamline your shipping process — and more that only Relai offers.
Instant Label Printing
Labels print automatically when sales are detected. No manual input needed.
Sequential Numbering
Each buyer gets a numbered label. Simple system to keep packages organized.
Repeat Buyer Detection
Automatically recognizes repeat buyers within a show. No duplicate bin labels.
Hands-Free Printing
Labels print while you focus on selling. No typing, no writing — just sell.
AI Vision & Lot Photos
Capture lot photos on save. Computer vision helps flag issues before they ship.
Buyer Locker Room
Buyers see their wins in a dedicated gallery — builds trust and repeat business.
After-Show PDF
Printable show summary grouped by buyer. Pack faster with less guesswork.
Live Sorter Page
Packing crew marks lots binned in real time with a shareable link.
Cloud App
Connect from anywhere. Web app in Chrome on Mac, Windows, or Linux desktop for printing.
Seller Dashboard
Track lots sold, locker visits, and estimated time saved across your shows.
Frequently asked questions
How does Relai know when someone wins?
You sign into your selling platform inside Relai's Chrome extension, and it watches your stream. On Whatnot it picks up auction wins, giveaways, Buy It Now purchases, and accepted offers automatically. On eBay Live it picks up auction wins. Nothing extra to set up.
Do I need my phone and my computer?
Yes. Sell from your phone or iPad like you normally do. Relai runs on your computer alongside your show, printing labels as buyers win.
What do I need to use Relai?
A seller account on a supported platform (Whatnot or eBay Live in testing), a thermal label printer, a Mac, Windows, or Linux desktop computer (not Chromebook), and Google Chrome. We recommend removable labels so they peel off cleanly without leaving residue.
Which browser do I need?
Google Chrome. Relai uses a Chrome extension plus the Relai web app — both require Chrome for the best experience.
How fast is setup?
Under 5 minutes. Install the Chrome extension, connect your printer, and choose your label size. You're ready to sell.
Does it work on Mac and Windows?
Yes. Mac requires macOS 11 or later. Windows 10 and 11 are both supported. Linux desktop (Ubuntu, Fedora, etc.) is also supported for printing. You must use Google Chrome as your web browser.
Does Relai work on Chromebook?
Relai Auction and Locker Room can run in Chrome on many devices, but silent automatic label printing does not work on Chromebook (Chrome OS). Chrome OS does not allow our print helper. Use a Mac, Windows PC, or Linux desktop as your show computer for printing — you can still stream from your phone or tablet.
What printers work?
If your computer can print to it, Relai can use it. We recommend a USB thermal printer for the best experience, but network and Bluetooth printers work too.
What label sizes can I use?
2×2", 2×3", 3×3", and 4×6". We recommend removable labels so they peel off cleanly.
Supported platforms
Live on Whatnot today. eBay Live in testing, with more on the way.
Whatnot
Live nowFull integration with automatic auction detection and label printing
eBay Live
In testingAuction win detection and label printing — currently in testing
TikTok Live
Coming soonComing soon
Facebook Live
Coming soonComing soon
Ready to make your workflow easier?
Faster. Smarter. Easier — Relai Start with a 7-day Silver trial, or pick Bronze, Silver, or Gold. All plans include Relai Auction, Locker Room, and label printing.
7-day free trial
Full Silver features · 300 photos · then $30/mo Bronze unless you upgrade or cancel
Relai Bronze
Run live shows without photos
$30 / month
- Relai Auction + Relai Locker Room
- Whatnot extension & Sorter
- Save lots without photos
- Basic show analytics
- 1 live show · 3 archived visible
Relai Silver
Photos + dashboard for growing sellers
$59 / month
- Everything in Bronze
- Seller dashboard
- Full show analytics
- 2,500 photos / month
- 1 live show · 20 archived visible
Relai Gold
Volume, branding, and history
$99 / month
- Everything in Silver
- 6,000 photos / month
- Branded per-show Locker Room + logo on photos
- Dashboard date filters
- 1 live show · 50 archived visible
Cancel anytime. No per-label fees. View full pricing on Relai · Sign in